sunbmac.c
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- /* $Id: sunbmac.c,v 1.28 2001/10/21 06:35:29 davem Exp $
- * sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
- *
- * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #include <linux/in.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <asm/system.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <linux/errno.h>
- #include <asm/byteorder.h>
- #include <asm/idprom.h>
- #include <asm/sbus.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- #include <asm/auxio.h>
- #include <asm/pgtable.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include "sunbmac.h"
- static char version[] __initdata =
- "sunbmac.c:v1.9 11/Sep/99 David S. Miller (davem@redhat.com)n";
- #undef DEBUG_PROBE
- #undef DEBUG_TX
- #undef DEBUG_IRQ
- #ifdef DEBUG_PROBE
- #define DP(x) printk x
- #else
- #define DP(x)
- #endif
- #ifdef DEBUG_TX
- #define DTX(x) printk x
- #else
- #define DTX(x)
- #endif
- #ifdef DEBUG_IRQ
- #define DIRQ(x) printk x
- #else
- #define DIRQ(x)
- #endif
- static struct bigmac *root_bigmac_dev;
- #define DEFAULT_JAMSIZE 4 /* Toe jam */
- #define QEC_RESET_TRIES 200
- static int qec_global_reset(unsigned long gregs)
- {
- int tries = QEC_RESET_TRIES;
- sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
- while (--tries) {
- if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
- udelay(20);
- continue;
- }
- break;
- }
- if (tries)
- return 0;
- printk(KERN_ERR "BigMAC: Cannot reset the QEC.n");
- return -1;
- }
- static void qec_init(struct bigmac *bp)
- {
- unsigned long gregs = bp->gregs;
- struct sbus_dev *qec_sdev = bp->qec_sdev;
- u8 bsizes = bp->bigmac_bursts;
- u32 regval;
- /* 64byte bursts do not work at the moment, do
- * not even try to enable them. -DaveM
- */
- if (bsizes & DMA_BURST32)
- regval = GLOB_CTRL_B32;
- else
- regval = GLOB_CTRL_B16;
- sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
- sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
- /* All of memsize is given to bigmac. */
- sbus_writel(qec_sdev->reg_addrs[1].reg_size,
- gregs + GLOB_MSIZE);
- /* Half to the transmitter, half to the receiver. */
- sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
- gregs + GLOB_TSIZE);
- sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
- gregs + GLOB_RSIZE);
- }
- #define TX_RESET_TRIES 32
- #define RX_RESET_TRIES 32
- static void bigmac_tx_reset(unsigned long bregs)
- {
- int tries = TX_RESET_TRIES;
- sbus_writel(0, bregs + BMAC_TXCFG);
- /* The fifo threshold bit is read-only and does
- * not clear. -DaveM
- */
- while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
- --tries != 0)
- udelay(20);
- if (!tries) {
- printk(KERN_ERR "BIGMAC: Transmitter will not reset.n");
- printk(KERN_ERR "BIGMAC: tx_cfg is %08xn",
- sbus_readl(bregs + BMAC_TXCFG));
- }
- }
- static void bigmac_rx_reset(unsigned long bregs)
- {
- int tries = RX_RESET_TRIES;
- sbus_writel(0, bregs + BMAC_RXCFG);
- while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
- udelay(20);
- if (!tries) {
- printk(KERN_ERR "BIGMAC: Receiver will not reset.n");
- printk(KERN_ERR "BIGMAC: rx_cfg is %08xn",
- sbus_readl(bregs + BMAC_RXCFG));
- }
- }
- /* Reset the transmitter and receiver. */
- static void bigmac_stop(struct bigmac *bp)
- {
- bigmac_tx_reset(bp->bregs);
- bigmac_rx_reset(bp->bregs);
- }
- static void bigmac_get_counters(struct bigmac *bp, unsigned long bregs)
- {
- struct net_device_stats *stats = &bp->enet_stats;
- stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
- sbus_writel(0, bregs + BMAC_RCRCECTR);
- stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
- sbus_writel(0, bregs + BMAC_UNALECTR);
- stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
- sbus_writel(0, bregs + BMAC_GLECTR);
- stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
- stats->collisions +=
- (sbus_readl(bregs + BMAC_EXCTR) +
- sbus_readl(bregs + BMAC_LTCTR));
- sbus_writel(0, bregs + BMAC_EXCTR);
- sbus_writel(0, bregs + BMAC_LTCTR);
- }
- static void bigmac_clean_rings(struct bigmac *bp)
- {
- int i;
- for (i = 0; i < RX_RING_SIZE; i++) {
- if (bp->rx_skbs[i] != NULL) {
- dev_kfree_skb_any(bp->rx_skbs[i]);
- bp->rx_skbs[i] = NULL;
- }
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- if (bp->tx_skbs[i] != NULL) {
- dev_kfree_skb_any(bp->tx_skbs[i]);
- bp->tx_skbs[i] = NULL;
- }
- }
- }
- static void bigmac_init_rings(struct bigmac *bp, int from_irq)
- {
- struct bmac_init_block *bb = bp->bmac_block;
- struct net_device *dev = bp->dev;
- int i, gfp_flags = GFP_KERNEL;
- if (from_irq || in_interrupt())
- gfp_flags = GFP_ATOMIC;
- bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
- /* Free any skippy bufs left around in the rings. */
- bigmac_clean_rings(bp);
- /* Now get new skbufs for the receive ring. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb;
- skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
- if (!skb)
- continue;
- bp->rx_skbs[i] = skb;
- skb->dev = dev;
- /* Because we reserve afterwards. */
- skb_put(skb, ETH_FRAME_LEN);
- skb_reserve(skb, 34);
- bb->be_rxd[i].rx_addr =
- sbus_map_single(bp->bigmac_sdev, skb->data,
- RX_BUF_ALLOC_SIZE - 34,
- SBUS_DMA_FROMDEVICE);
- bb->be_rxd[i].rx_flags =
- (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
- }
- for (i = 0; i < TX_RING_SIZE; i++)
- bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
- }
- #define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
- #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
- static void idle_transceiver(unsigned long tregs)
- {
- int i = 20;
- while (i--) {
- sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- }
- }
- static void write_tcvr_bit(struct bigmac *bp, unsigned long tregs, int bit)
- {
- if (bp->tcvr_type == internal) {
- bit = (bit & 1) << 3;
- sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- } else if (bp->tcvr_type == external) {
- bit = (bit & 1) << 2;
- sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- } else {
- printk(KERN_ERR "write_tcvr_bit: No transceiver type known!n");
- }
- }
- static int read_tcvr_bit(struct bigmac *bp, unsigned long tregs)
- {
- int retval = 0;
- if (bp->tcvr_type == internal) {
- sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
- } else if (bp->tcvr_type == external) {
- sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
- } else {
- printk(KERN_ERR "read_tcvr_bit: No transceiver type known!n");
- }
- return retval;
- }
- static int read_tcvr_bit2(struct bigmac *bp, unsigned long tregs)
- {
- int retval = 0;
- if (bp->tcvr_type == internal) {
- sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
- sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- } else if (bp->tcvr_type == external) {
- sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
- sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- } else {
- printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!n");
- }
- return retval;
- }
- static void put_tcvr_byte(struct bigmac *bp,
- unsigned long tregs,
- unsigned int byte)
- {
- int shift = 4;
- do {
- write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
- shift -= 1;
- } while (shift >= 0);
- }
- static void bigmac_tcvr_write(struct bigmac *bp, unsigned long tregs,
- int reg, unsigned short val)
- {
- int shift;
- reg &= 0xff;
- val &= 0xffff;
- switch(bp->tcvr_type) {
- case internal:
- case external:
- break;
- default:
- printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.n");
- return;
- };
- idle_transceiver(tregs);
- write_tcvr_bit(bp, tregs, 0);
- write_tcvr_bit(bp, tregs, 1);
- write_tcvr_bit(bp, tregs, 0);
- write_tcvr_bit(bp, tregs, 1);
- put_tcvr_byte(bp, tregs,
- ((bp->tcvr_type == internal) ?
- BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
- put_tcvr_byte(bp, tregs, reg);
- write_tcvr_bit(bp, tregs, 1);
- write_tcvr_bit(bp, tregs, 0);
- shift = 15;
- do {
- write_tcvr_bit(bp, tregs, (val >> shift) & 1);
- shift -= 1;
- } while (shift >= 0);
- }
- static unsigned short bigmac_tcvr_read(struct bigmac *bp,
- unsigned long tregs,
- int reg)
- {
- unsigned short retval = 0;
- reg &= 0xff;
- switch(bp->tcvr_type) {
- case internal:
- case external:
- break;
- default:
- printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.n");
- return 0xffff;
- };
- idle_transceiver(tregs);
- write_tcvr_bit(bp, tregs, 0);
- write_tcvr_bit(bp, tregs, 1);
- write_tcvr_bit(bp, tregs, 1);
- write_tcvr_bit(bp, tregs, 0);
- put_tcvr_byte(bp, tregs,
- ((bp->tcvr_type == internal) ?
- BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
- put_tcvr_byte(bp, tregs, reg);
- if (bp->tcvr_type == external) {
- int shift = 15;
- (void) read_tcvr_bit2(bp, tregs);
- (void) read_tcvr_bit2(bp, tregs);
- do {
- int tmp;
- tmp = read_tcvr_bit2(bp, tregs);
- retval |= ((tmp & 1) << shift);
- shift -= 1;
- } while (shift >= 0);
- (void) read_tcvr_bit2(bp, tregs);
- (void) read_tcvr_bit2(bp, tregs);
- (void) read_tcvr_bit2(bp, tregs);
- } else {
- int shift = 15;
- (void) read_tcvr_bit(bp, tregs);
- (void) read_tcvr_bit(bp, tregs);
- do {
- int tmp;
- tmp = read_tcvr_bit(bp, tregs);
- retval |= ((tmp & 1) << shift);
- shift -= 1;
- } while (shift >= 0);
- (void) read_tcvr_bit(bp, tregs);
- (void) read_tcvr_bit(bp, tregs);
- (void) read_tcvr_bit(bp, tregs);
- }
- return retval;
- }
- static void bigmac_tcvr_init(struct bigmac *bp)
- {
- unsigned long tregs = bp->tregs;
- u32 mpal;
- idle_transceiver(tregs);
- sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
- tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- /* Only the bit for the present transceiver (internal or
- * external) will stick, set them both and see what stays.
- */
- sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
- sbus_readl(tregs + TCVR_MPAL);
- udelay(20);
- mpal = sbus_readl(tregs + TCVR_MPAL);
- if (mpal & MGMT_PAL_EXT_MDIO) {
- bp->tcvr_type = external;
- sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
- tregs + TCVR_TPAL);
- sbus_readl(tregs + TCVR_TPAL);
- } else if (mpal & MGMT_PAL_INT_MDIO) {
- bp->tcvr_type = internal;
- sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
- TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
- tregs + TCVR_TPAL);
- sbus_readl(tregs + TCVR_TPAL);
- } else {
- printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
- "external MDIO available!n");
- printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]n",
- sbus_readl(tregs + TCVR_MPAL),
- sbus_readl(tregs + TCVR_TPAL));
- }
- }
- static int bigmac_init(struct bigmac *, int);
- static int try_next_permutation(struct bigmac *bp, unsigned long tregs)
- {
- if (bp->sw_bmcr & BMCR_SPEED100) {
- int timeout;
- /* Reset the PHY. */
- bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- bp->sw_bmcr = (BMCR_RESET);
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- timeout = 64;
- while (--timeout) {
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- if ((bp->sw_bmcr & BMCR_RESET) == 0)
- break;
- udelay(20);
- }
- if (timeout == 0)
- printk(KERN_ERR "%s: PHY reset failed.n", bp->dev->name);
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- /* Now we try 10baseT. */
- bp->sw_bmcr &= ~(BMCR_SPEED100);
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- return 0;
- }
- /* We've tried them all. */
- return -1;
- }
- static void bigmac_timer(unsigned long data)
- {
- struct bigmac *bp = (struct bigmac *) data;
- unsigned long tregs = bp->tregs;
- int restart_timer = 0;
- bp->timer_ticks++;
- if (bp->timer_state == ltrywait) {
- bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- if (bp->sw_bmsr & BMSR_LSTATUS) {
- printk(KERN_INFO "%s: Link is now up at %s.n",
- bp->dev->name,
- (bp->sw_bmcr & BMCR_SPEED100) ?
- "100baseT" : "10baseT");
- bp->timer_state = asleep;
- restart_timer = 0;
- } else {
- if (bp->timer_ticks >= 4) {
- int ret;
- ret = try_next_permutation(bp, tregs);
- if (ret == -1) {
- printk(KERN_ERR "%s: Link down, cable problem?n",
- bp->dev->name);
- ret = bigmac_init(bp, 0);
- if (ret) {
- printk(KERN_ERR "%s: Error, cannot re-init the "
- "BigMAC.n", bp->dev->name);
- }
- return;
- }
- bp->timer_ticks = 0;
- restart_timer = 1;
- } else {
- restart_timer = 1;
- }
- }
- } else {
- /* Can't happens.... */
- printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!n",
- bp->dev->name);
- restart_timer = 0;
- bp->timer_ticks = 0;
- bp->timer_state = asleep; /* foo on you */
- }
- if (restart_timer != 0) {
- bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
- add_timer(&bp->bigmac_timer);
- }
- }
- /* Well, really we just force the chip into 100baseT then
- * 10baseT, each time checking for a link status.
- */
- static void bigmac_begin_auto_negotiation(struct bigmac *bp)
- {
- unsigned long tregs = bp->tregs;
- int timeout;
- /* Grab new software copies of PHY registers. */
- bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- /* Reset the PHY. */
- bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- bp->sw_bmcr = (BMCR_RESET);
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- timeout = 64;
- while (--timeout) {
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- if ((bp->sw_bmcr & BMCR_RESET) == 0)
- break;
- udelay(20);
- }
- if (timeout == 0)
- printk(KERN_ERR "%s: PHY reset failed.n", bp->dev->name);
- bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
- /* First we try 100baseT. */
- bp->sw_bmcr |= BMCR_SPEED100;
- bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
- bp->timer_state = ltrywait;
- bp->timer_ticks = 0;
- bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
- bp->bigmac_timer.data = (unsigned long) bp;
- bp->bigmac_timer.function = &bigmac_timer;
- add_timer(&bp->bigmac_timer);
- }
- static int bigmac_init(struct bigmac *bp, int from_irq)
- {
- unsigned long gregs = bp->gregs;
- unsigned long cregs = bp->creg;
- unsigned long bregs = bp->bregs;
- unsigned char *e = &bp->dev->dev_addr[0];
- /* Latch current counters into statistics. */
- bigmac_get_counters(bp, bregs);
- /* Reset QEC. */
- qec_global_reset(gregs);
- /* Init QEC. */
- qec_init(bp);
- /* Alloc and reset the tx/rx descriptor chains. */
- bigmac_init_rings(bp, from_irq);
- /* Initialize the PHY. */
- bigmac_tcvr_init(bp);
- /* Stop transmitter and receiver. */
- bigmac_stop(bp);
- /* Set hardware ethernet address. */
- sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
- sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
- sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
- /* Clear the hash table until mc upload occurs. */
- sbus_writel(0, bregs + BMAC_HTABLE3);
- sbus_writel(0, bregs + BMAC_HTABLE2);
- sbus_writel(0, bregs + BMAC_HTABLE1);
- sbus_writel(0, bregs + BMAC_HTABLE0);
- /* Enable Big Mac hash table filter. */
- sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
- bregs + BMAC_RXCFG);
- udelay(20);
- /* Ok, configure the Big Mac transmitter. */
- sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
- /* The HME docs recommend to use the 10LSB of our MAC here. */
- sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
- bregs + BMAC_RSEED);
- /* Enable the output drivers no matter what. */
- sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
- bregs + BMAC_XIFCFG);
- /* Tell the QEC where the ring descriptors are. */
- sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
- cregs + CREG_RXDS);
- sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
- cregs + CREG_TXDS);
- /* Setup the FIFO pointers into QEC local memory. */
- sbus_writel(0, cregs + CREG_RXRBUFPTR);
- sbus_writel(0, cregs + CREG_RXWBUFPTR);
- sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
- cregs + CREG_TXRBUFPTR);
- sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
- cregs + CREG_TXWBUFPTR);
- /* Tell bigmac what interrupts we don't want to hear about. */
- sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
- bregs + BMAC_IMASK);
- /* Enable the various other irq's. */
- sbus_writel(0, cregs + CREG_RIMASK);
- sbus_writel(0, cregs + CREG_TIMASK);
- sbus_writel(0, cregs + CREG_QMASK);
- sbus_writel(0, cregs + CREG_BMASK);
- /* Set jam size to a reasonable default. */
- sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
- /* Clear collision counter. */
- sbus_writel(0, cregs + CREG_CCNT);
- /* Enable transmitter and receiver. */
- sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
- bregs + BMAC_TXCFG);
- sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
- bregs + BMAC_RXCFG);
- /* Ok, start detecting link speed/duplex. */
- bigmac_begin_auto_negotiation(bp);
- /* Success. */
- return 0;
- }
- /* Error interrupts get sent here. */
- static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
- {
- printk(KERN_ERR "bigmac_is_medium_rare: ");
- if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
- if (qec_status & GLOB_STAT_ER)
- printk("QEC_ERROR, ");
- if (qec_status & GLOB_STAT_BM)
- printk("QEC_BMAC_ERROR, ");
- }
- if (bmac_status & CREG_STAT_ERRORS) {
- if (bmac_status & CREG_STAT_BERROR)
- printk("BMAC_ERROR, ");
- if (bmac_status & CREG_STAT_TXDERROR)
- printk("TXD_ERROR, ");
- if (bmac_status & CREG_STAT_TXLERR)
- printk("TX_LATE_ERROR, ");
- if (bmac_status & CREG_STAT_TXPERR)
- printk("TX_PARITY_ERROR, ");
- if (bmac_status & CREG_STAT_TXSERR)
- printk("TX_SBUS_ERROR, ");
- if (bmac_status & CREG_STAT_RXDROP)
- printk("RX_DROP_ERROR, ");
- if (bmac_status & CREG_STAT_RXSMALL)
- printk("RX_SMALL_ERROR, ");
- if (bmac_status & CREG_STAT_RXLERR)
- printk("RX_LATE_ERROR, ");
- if (bmac_status & CREG_STAT_RXPERR)
- printk("RX_PARITY_ERROR, ");
- if (bmac_status & CREG_STAT_RXSERR)
- printk("RX_SBUS_ERROR, ");
- }
- printk(" RESETn");
- bigmac_init(bp, 1);
- }
- /* BigMAC transmit complete service routines. */
- static void bigmac_tx(struct bigmac *bp)
- {
- struct be_txd *txbase = &bp->bmac_block->be_txd[0];
- struct net_device *dev = bp->dev;
- int elem;
- spin_lock(&bp->lock);
- elem = bp->tx_old;
- DTX(("bigmac_tx: tx_old[%d] ", elem));
- while (elem != bp->tx_new) {
- struct sk_buff *skb;
- struct be_txd *this = &txbase[elem];
- DTX(("this(%p) [flags(%08x)addr(%08x)]",
- this, this->tx_flags, this->tx_addr));
- if (this->tx_flags & TXD_OWN)
- break;
- skb = bp->tx_skbs[elem];
- bp->enet_stats.tx_packets++;
- bp->enet_stats.tx_bytes += skb->len;
- sbus_unmap_single(bp->bigmac_sdev,
- this->tx_addr, skb->len,
- SBUS_DMA_TODEVICE);
- DTX(("skb(%p) ", skb));
- bp->tx_skbs[elem] = NULL;
- dev_kfree_skb_irq(skb);
- elem = NEXT_TX(elem);
- }
- DTX((" DONE, tx_old=%dn", elem));
- bp->tx_old = elem;
- if (netif_queue_stopped(dev) &&
- TX_BUFFS_AVAIL(bp) > 0)
- netif_wake_queue(bp->dev);
- spin_unlock(&bp->lock);
- }
- /* BigMAC receive complete service routines. */
- static void bigmac_rx(struct bigmac *bp)
- {
- struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
- struct be_rxd *this;
- int elem = bp->rx_new, drops = 0;
- u32 flags;
- this = &rxbase[elem];
- while (!((flags = this->rx_flags) & RXD_OWN)) {
- struct sk_buff *skb;
- int len = (flags & RXD_LENGTH); /* FCS not included */
- /* Check for errors. */
- if (len < ETH_ZLEN) {
- bp->enet_stats.rx_errors++;
- bp->enet_stats.rx_length_errors++;
- drop_it:
- /* Return it to the BigMAC. */
- bp->enet_stats.rx_dropped++;
- this->rx_flags =
- (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
- goto next;
- }
- skb = bp->rx_skbs[elem];
- if (len > RX_COPY_THRESHOLD) {
- struct sk_buff *new_skb;
- /* Now refill the entry, if we can. */
- new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if (new_skb == NULL) {
- drops++;
- goto drop_it;
- }
- sbus_unmap_single(bp->bigmac_sdev,
- this->rx_addr,
- RX_BUF_ALLOC_SIZE - 34,
- SBUS_DMA_FROMDEVICE);
- bp->rx_skbs[elem] = new_skb;
- new_skb->dev = bp->dev;
- skb_put(new_skb, ETH_FRAME_LEN);
- skb_reserve(new_skb, 34);
- this->rx_addr = sbus_map_single(bp->bigmac_sdev,
- new_skb->data,
- RX_BUF_ALLOC_SIZE - 34,
- SBUS_DMA_FROMDEVICE);
- this->rx_flags =
- (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
- /* Trim the original skb for the netif. */
- skb_trim(skb, len);
- } else {
- struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
- if (copy_skb == NULL) {
- drops++;
- goto drop_it;
- }
- copy_skb->dev = bp->dev;
- skb_reserve(copy_skb, 2);
- skb_put(copy_skb, len);
- sbus_dma_sync_single(bp->bigmac_sdev,
- this->rx_addr, len, SBUS_DMA_FROMDEVICE);
- eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
- /* Reuse original ring buffer. */
- this->rx_flags =
- (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
- skb = copy_skb;
- }
- /* No checksums done by the BigMAC ;-( */
- skb->protocol = eth_type_trans(skb, bp->dev);
- netif_rx(skb);
- bp->dev->last_rx = jiffies;
- bp->enet_stats.rx_packets++;
- bp->enet_stats.rx_bytes += len;
- next:
- elem = NEXT_RX(elem);
- this = &rxbase[elem];
- }
- bp->rx_new = elem;
- if (drops)
- printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.n", bp->dev->name);
- }
- static void bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct bigmac *bp = (struct bigmac *) dev_id;
- u32 qec_status, bmac_status;
- DIRQ(("bigmac_interrupt: "));
- /* Latch status registers now. */
- bmac_status = sbus_readl(bp->creg + CREG_STAT);
- qec_status = sbus_readl(bp->gregs + GLOB_STAT);
- DIRQ(("qec_status=%08x bmac_status=%08xn", qec_status, bmac_status));
- if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
- (bmac_status & CREG_STAT_ERRORS))
- bigmac_is_medium_rare(bp, qec_status, bmac_status);
- if (bmac_status & CREG_STAT_TXIRQ)
- bigmac_tx(bp);
- if (bmac_status & CREG_STAT_RXIRQ)
- bigmac_rx(bp);
- }
- static int bigmac_open(struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- int ret;
- ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
- if (ret) {
- printk(KERN_ERR "BIGMAC: Can't order irq %d to go.n", dev->irq);
- return ret;
- }
- init_timer(&bp->bigmac_timer);
- ret = bigmac_init(bp, 0);
- if (ret)
- free_irq(dev->irq, bp);
- return ret;
- }
- static int bigmac_close(struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- del_timer(&bp->bigmac_timer);
- bp->timer_state = asleep;
- bp->timer_ticks = 0;
- bigmac_stop(bp);
- bigmac_clean_rings(bp);
- free_irq(dev->irq, bp);
- return 0;
- }
- static void bigmac_tx_timeout(struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- bigmac_init(bp, 0);
- netif_wake_queue(dev);
- }
- /* Put a packet on the wire. */
- static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- int len, entry;
- u32 mapping;
- len = skb->len;
- mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
- /* Avoid a race... */
- spin_lock_irq(&bp->lock);
- entry = bp->tx_new;
- DTX(("bigmac_start_xmit: len(%d) entry(%d)n", len, entry));
- bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
- bp->tx_skbs[entry] = skb;
- bp->bmac_block->be_txd[entry].tx_addr = mapping;
- bp->bmac_block->be_txd[entry].tx_flags =
- (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
- bp->tx_new = NEXT_TX(entry);
- if (TX_BUFFS_AVAIL(bp) <= 0)
- netif_stop_queue(dev);
- spin_unlock_irq(&bp->lock);
- /* Get it going. */
- sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
- dev->trans_start = jiffies;
- return 0;
- }
- static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- bigmac_get_counters(bp, bp->bregs);
- return &bp->enet_stats;
- }
- #define CRC_POLYNOMIAL_BE 0x04c11db7UL /* Ethernet CRC, big endian */
- #define CRC_POLYNOMIAL_LE 0xedb88320UL /* Ethernet CRC, little endian */
- static void bigmac_set_multicast(struct net_device *dev)
- {
- struct bigmac *bp = (struct bigmac *) dev->priv;
- unsigned long bregs = bp->bregs;
- struct dev_mc_list *dmi = dev->mc_list;
- char *addrs;
- int i, j, bit, byte;
- u32 tmp, crc, poly = CRC_POLYNOMIAL_LE;
- /* Disable the receiver. The bit self-clears when
- * the operation is complete.
- */
- tmp = sbus_readl(bregs + BMAC_RXCFG);
- tmp &= ~(BIGMAC_RXCFG_ENABLE);
- sbus_writel(tmp, bregs + BMAC_RXCFG);
- while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
- udelay(20);
- if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
- sbus_writel(0xffff, bregs + BMAC_HTABLE0);
- sbus_writel(0xffff, bregs + BMAC_HTABLE1);
- sbus_writel(0xffff, bregs + BMAC_HTABLE2);
- sbus_writel(0xffff, bregs + BMAC_HTABLE3);
- } else if (dev->flags & IFF_PROMISC) {
- tmp = sbus_readl(bregs + BMAC_RXCFG);
- tmp |= BIGMAC_RXCFG_PMISC;
- sbus_writel(tmp, bregs + BMAC_RXCFG);
- } else {
- u16 hash_table[4];
- for (i = 0; i < 4; i++)
- hash_table[i] = 0;
- for (i = 0; i < dev->mc_count; i++) {
- addrs = dmi->dmi_addr;
- dmi = dmi->next;
- if (!(*addrs & 1))
- continue;
- crc = 0xffffffffU;
- for (byte = 0; byte < 6; byte++) {
- for (bit = *addrs++, j = 0; j < 8; j++, bit >>= 1) {
- int test;
- test = ((bit ^ crc) & 0x01);
- crc >>= 1;
- if (test)
- crc = crc ^ poly;
- }
- }
- crc >>= 26;
- hash_table[crc >> 4] |= 1 << (crc & 0xf);
- }
- sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
- sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
- sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
- sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
- }
- /* Re-enable the receiver. */
- tmp = sbus_readl(bregs + BMAC_RXCFG);
- tmp |= BIGMAC_RXCFG_ENABLE;
- sbus_writel(tmp, bregs + BMAC_RXCFG);
- }
- static int __init bigmac_ether_init(struct net_device *dev, struct sbus_dev *qec_sdev)
- {
- static int version_printed;
- struct bigmac *bp;
- u8 bsizes, bsizes_more;
- int i;
- /* Get a new device struct for this interface. */
- dev = init_etherdev(NULL, sizeof(struct bigmac));
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- if (version_printed++ == 0)
- printk(KERN_INFO "%s", version);
- if (!dev)
- return -ENOMEM;
- /* Report what we have found to the user. */
- printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
- dev->base_addr = (long) qec_sdev;
- for (i = 0; i < 6; i++)
- printk("%2.2x%c", dev->dev_addr[i] = idprom->id_ethaddr[i],
- i == 5 ? ' ' : ':');
- printk("n");
- /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
- bp = dev->priv;
- bp->qec_sdev = qec_sdev;
- bp->bigmac_sdev = qec_sdev->child;
- spin_lock_init(&bp->lock);
- /* Verify the registers we expect, are actually there. */
- if ((bp->bigmac_sdev->num_registers != 3) ||
- (bp->qec_sdev->num_registers != 2)) {
- printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.n",
- bp->qec_sdev->num_registers,
- bp->bigmac_sdev->num_registers);
- printk(KERN_ERR "BIGMAC: Would you like that for here or to go?n");
- goto fail_and_cleanup;
- }
- /* Map in QEC global control registers. */
- bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
- GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
- if (!bp->gregs) {
- printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.n");
- goto fail_and_cleanup;
- }
- /* Make sure QEC is in BigMAC mode. */
- if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
- printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!n");
- goto fail_and_cleanup;
- }
- /* Reset the QEC. */
- if (qec_global_reset(bp->gregs))
- goto fail_and_cleanup;
- /* Get supported SBUS burst sizes. */
- bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
- "burst-sizes",
- 0xff);
- bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
- "burst-sizes",
- 0xff);
- bsizes &= 0xff;
- if (bsizes_more != 0xff)
- bsizes &= bsizes_more;
- if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
- (bsizes & DMA_BURST32) == 0)
- bsizes = (DMA_BURST32 - 1);
- bp->bigmac_bursts = bsizes;
- /* Perform QEC initialization. */
- qec_init(bp);
- /* Map in the BigMAC channel registers. */
- bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
- CREG_REG_SIZE, "BigMAC QEC Channel Regs");
- if (!bp->creg) {
- printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.n");
- goto fail_and_cleanup;
- }
- /* Map in the BigMAC control registers. */
- bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
- BMAC_REG_SIZE, "BigMAC Primary Regs");
- if (!bp->bregs) {
- printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.n");
- goto fail_and_cleanup;
- }
- /* Map in the BigMAC transceiver registers, this is how you poke at
- * the BigMAC's PHY.
- */
- bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
- TCVR_REG_SIZE, "BigMAC Transceiver Regs");
- if (!bp->tregs) {
- printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.n");
- goto fail_and_cleanup;
- }
- /* Stop the BigMAC. */
- bigmac_stop(bp);
- /* Allocate transmit/receive descriptor DVMA block. */
- bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
- PAGE_SIZE,
- &bp->bblock_dvma);
- if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
- printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.n");
- goto fail_and_cleanup;
- }
- /* Get the board revision of this BigMAC. */
- bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
- "board-version", 1);
- /* Init auto-negotiation timer state. */
- init_timer(&bp->bigmac_timer);
- bp->timer_state = asleep;
- bp->timer_ticks = 0;
- /* Backlink to generic net device struct. */
- bp->dev = dev;
- /* Set links to our BigMAC open and close routines. */
- dev->open = &bigmac_open;
- dev->stop = &bigmac_close;
- dev->hard_start_xmit = &bigmac_start_xmit;
- /* Set links to BigMAC statistic and multi-cast loading code. */
- dev->get_stats = &bigmac_get_stats;
- dev->set_multicast_list = &bigmac_set_multicast;
- dev->tx_timeout = &bigmac_tx_timeout;
- dev->watchdog_timeo = 5*HZ;
- /* Finish net device registration. */
- dev->irq = bp->bigmac_sdev->irqs[0];
- dev->dma = 0;
- ether_setup(dev);
- /* Put us into the list of instances attached for later driver
- * exit.
- */
- bp->next_module = root_bigmac_dev;
- root_bigmac_dev = bp;
- return 0;
- fail_and_cleanup:
- /* Something went wrong, undo whatever we did so far. */
- /* Free register mappings if any. */
- if (bp->gregs)
- sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
- if (bp->creg)
- sbus_iounmap(bp->creg, CREG_REG_SIZE);
- if (bp->bregs)
- sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
- if (bp->tregs)
- sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
- if (bp->bmac_block)
- sbus_free_consistent(bp->bigmac_sdev,
- PAGE_SIZE,
- bp->bmac_block,
- bp->bblock_dvma);
- unregister_netdev(dev);
- kfree(dev);
- return -ENODEV;
- }
- /* QEC can be the parent of either QuadEthernet or
- * a BigMAC. We want the latter.
- */
- static int __init bigmac_match(struct sbus_dev *sdev)
- {
- struct sbus_dev *child = sdev->child;
- if (strcmp(sdev->prom_name, "qec") != 0)
- return 0;
- if (child == NULL)
- return 0;
- if (strcmp(child->prom_name, "be") != 0)
- return 0;
- return 1;
- }
- static int __init bigmac_probe(void)
- {
- struct net_device *dev = NULL;
- struct sbus_bus *sbus;
- struct sbus_dev *sdev = 0;
- static int called;
- int cards = 0, v;
- root_bigmac_dev = NULL;
- if (called)
- return -ENODEV;
- called++;
- for_each_sbus(sbus) {
- for_each_sbusdev(sdev, sbus) {
- if (cards)
- dev = NULL;
- if (bigmac_match(sdev)) {
- cards++;
- if ((v = bigmac_ether_init(dev, sdev)))
- return v;
- }
- }
- }
- if (!cards)
- return -ENODEV;
- return 0;
- }
- static void __exit bigmac_cleanup(void)
- {
- while (root_bigmac_dev) {
- struct bigmac *bp = root_bigmac_dev;
- struct bigmac *bp_nxt = root_bigmac_dev->next_module;
- sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
- sbus_iounmap(bp->creg, CREG_REG_SIZE);
- sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
- sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
- sbus_free_consistent(bp->bigmac_sdev,
- PAGE_SIZE,
- bp->bmac_block,
- bp->bblock_dvma);
- unregister_netdev(bp->dev);
- kfree(bp->dev);
- root_bigmac_dev = bp_nxt;
- }
- }
- module_init(bigmac_probe);
- module_exit(bigmac_cleanup);
- MODULE_LICENSE("GPL");